<template>
     <!-- 头部部分 -->
    <header class="header">
      <h1>todos</h1>
      <input @keydown.enter="add" v-model.trim="name" class="new-todo" placeholder="请输入任务名称" autofocus />
    </header>
</template>

<script>
export default {
    data (){
        return {
            name:''
        }
    },
    methods:{
        add(){
            if(this.name==='') return alert('请输入正确信息')
            this.$emit('hadd',this.name)
            this.name=''
        }
    }

}
</script>

<style>

</style>